John cochban



(No Model.)

J. GOGHRAN. Jr. MECHANICAL MOVEMENT.

No. 281.976. Patented July 24, 1883.

NITED STATES PATENT JOHN COCHRAN, JR, OF MILLNOQD, ASSIGNOR TO SHERMAN A. TAGUE, OF BRISCOE, MISSOURI.

MECHANICAL MOVEM ENT.

SPECIFICATION forming part of Iietters Patent No. 281,976, dated July 24, 1883.

Application filed June 9, 1883. (No model.)

' To alZ'whom it may concern.-

Be itknown that 1, Joan COCHRAN, Jr., of Millwood, in the county of Lincoln and State ofMissouri, have invented certain new and useful Improvements in Mechanical Movements; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will. enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

This improvement has relation to that class of inventions known as mechanical movements, having for its object the conversion and utilization of rotary motion into a compound longitudinal reciprocating motion, admirably adapted in connection with machines wherein rotary motion is employed-such as mowers'and reapers-for operating knives to cut grass, grain, and such like, and also in sewing-machines for imparting a back and forward movement of the shuttle, and in various other similar operations, such as will be apparent to the skilled mechanic.

To this end the invention consists in a wheel turning with a shaft, and having projecting radially from its inner face and at near its circumference a series of studs or cams, said cams arranged at suitable predetermined distances each from the other, and adaptedby the revo-' lution of the wheel to engage with and to impart to a series of pivoted levers an alternate swinging or vibratory motion, whereby alongitudinal reciprocating movement is given a shaft, which may by suitable connection be utilized for any of the beforementioned purposes, the construction and operation of which mechanical contrivance will be more particularly hereinafter explained.

Reference being had to the accompanying sheet of drawings, Figure 1 is an elevation in perspective of my improved device. Fig. 2 is a section of one of the oseillatinglevers, showing an anti-friction roller in a bend or angle in the longer arm thereof; and Fig. 3 is a perspective view of the wheel, showing the cams there on. Fig. 4 is a view of cam or stud and cap or ferrule therefor.

Referring to the parts by letter, A represents the frame, which, by way of illustration, is shown mounted thereon the remaining parts of the contrivanee.

B is a wheel adapted to turn with a shaft, and by which the movements of the remaining parts are perpetuated. Said wheel has on its inner face a series of cams, (1. Pivotally secured to the frame are two levers, b I), which are formed at the end of theirlonger arm with a branch, 1), whereby is formed a shoulder, 0, having secured therein an anti-friction roller, 0. On the top face of the branch is preferably secured a spring, (I, for the purpose of preventing shock, and to give a yielding resistance when the shoulder, by the revolution of the wheel, is struck by the cams. The roller 0 is to lessen friction between the parts and to more readily allow the cams to slip away from the shoulder, so that the movement will be very easy. The shorter arms of these levers are connected by a link, 6, and also to the shorter arm of either one or the other of said levers is a connecting-rod, C, which rod inthis case, to illustrate the application of my device, is connected to the rim of a cutter,knife or sickle, 0, showing how grass or grain may be cut in such application. Said cuttenknife is slotted, as at e, bywhich it works on screws 9, secured in the frame. a is a ferrule or cap of brass for the cam, for preserving the same from wear and to lessen friction.

The operation is as follows: \Vewill suppose the wheel to be revolving in the direction as indicated by the arrow. The cam a will strike or come in contact with the shoulder 0 of the lever I), and be allowed yielding resistance by the spring, as explained, and permitted to glance off by the roller (in case both are employedtogether) with but slight friction. When this longer arm is struck by a cam it is thrown slightly outward, and by its connection at the bottom with the opposite lever, b, the longer arm of this lever is simultaneously brought in and is raised by the next preceding cam on the wheel. As the longer arm or lever 1) is thrown out the connecting-rod G is sent forward, and the lever Z) is immediately raised (as explained) and the shaft brought back, thus gaining a longitudinal reciprocat- IOO ing motion of the knives. are employed four cams, which give as many movements of the shaft to one revolution of the wheel, and it will be apparent that the number of cams may be varied to suit requirements of greater orless work. It will be observed that as one lever has been engaged bya cam the opposite lever is inunediately operated, and that very little motion is lost.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, 1s

1. In mechanism for converting rotary into a reciprocating motion, the wheel adapted to revolve with a shaft, and having on its face thecams having caps, in combination with the pivotallyswinging levers, connected at their shorter arms, as described, whereby on the revolution of the wheel the rod is operated, substantially as set forth. 1

. 2. In a mechanical movement, the combina; tion of thelevers pivoted to the frame, and hav-? ing the angle at the end of the longer arm, wh ereby is formed the shoulder 0, having th erein anti-friction roller 0, and the spring on the face of said angle, with thclink conuectingthe As shown, there 1 shorter arms, the connecting-rod, and means,

substantially as described, whereby the same are operated, as set forth.

3. In a mechanical movement, the combination, with the levers formed and pivoted as described, the link connecting the shorter arms thereof, the connecting-rod and cutter-bar, and the wheel having on its inner face the cams, said cams being so arranged that when one lever is engaged the other is immediately operated without loss of motion, substantially as set forth.

4. Inamechanical movement, the combination of the levers pivoted to the frame and having the angle in their longer arms, as de scribed, with the link connecting the shorter arms, the connecting-rod, and means,substantially as set forth, whereby they are operated.

In testimony that I claim the foregoing as my own I aflix my signature in presence of two witnesses.

JOHN (OCIIRAN, Jn.

\Vitnesses:

B. F. ll'lonsnmp, lGDwAnn ll. Ennis. 

